that were we to have the same rules applied to us, we would just be selling our hydro and substituting in other renewable resources. the objective of the law is to in part to reduce the emissions from power plants. we don't have any power plants that emit. >> [inaudible]. >> yeah, i have a couple of questions. so, we can't bank the rps resources? >> we can. under the rules, we can -- if we have -- if we do that math equation and we have lots of extra rps compliant power, we can bank those renewable energy credits. you earlier allowed us to register with us the western system that allows folks to have those credits certified in a way that's recognized by the marketplace. we are registering those credits, then, and we can use them ourselves in a subsequent compliance year. so, for example, in this year because last year was wet, 2011 was wet, we had some extra. this year we're going to need to purchase some, but we're also taking some of what we generated last year and applying it to this year. so, we're not having to purchase as much as we otherwise would have. >> and they don't expire?